The BBC was found to have committed a "serious breach" of media regulations by not revealing that the voice of a film about Gaza was the offspring of a Hamas representative, as determined by regulatory body Ofcom.
An probe by Ofcom into Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The head of the BBC had previously apologised, stating there had been "a serious error in relation to factual correctness".
The authority has directed the broadcaster to broadcast a evening statement about its decisions.
"Given this constitutes a significant violation of our rules, we are directing the broadcaster to transmit a statement of our findings against it on BBC Two at 9pm, with a date to be finalised," it said.
'Risk to Damage Credibility'
The authority's report declared: "The inquiry we conducted determined that the programme's lack of disclosure that the voice's parent served in a post in the Hamas-run authority was substantially inaccurate.
"Consequently that the audience did not have essential details which may have been very significant to their assessment of the voice and the information he provided.
"Credibility is at the center of the bond between a broadcaster and its viewers, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the risk to damage the significantly high degrees of credibility that viewers would have placed in a BBC factual programme about the Gaza conflict."
The documentary was pulled from the BBC's streaming service in February after the narrator's personal associations came to light, and in this past July an broadcaster's internal assessment found it breached the corporation's editorial guidelines on factual correctness.
A BBC spokesperson commented: "The authority's determination is in line with the findings of the internal assessment, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on accuracy, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the regulator's ruling in its entirety. We will follow the sanction as soon as the date and wording are determined."
